18253953 has 6 divisors (see below), whose sum is σ = 26366834. Its totient is φ = 12169296.

The previous prime is 18253943. The next prime is 18253957. The reversal of 18253953 is 35935281.

It can be written as a sum of positive squares in only one way, i.e., 18249984 + 3969 = 4272^2 + 63^2 .

It is not a de Polignac number, because 18253953 - 2²² = 14059649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18253957) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1014100 + ... + 1014117.

Almost surely, 2^18253953 is an apocalyptic number.

It is an amenable number.

18253953 is a deficient number, since it is larger than the sum of its proper divisors (8112881).

18253953 is a wasteful number, since it uses less digits than its factorization.

18253953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2028223 (or 2028220 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 18253953 is about 4272.4645112628. The cubic root of 18253953 is about 263.3008792278.

It can be divided in two parts, 1825 and 3953, that added together give a triangular number (5778 = T₁₀₇).

The spelling of 18253953 in words is "eighteen million, two hundred fifty-three thousand, nine hundred fifty-three".